/**
 Allows input of unique cars into the museum.
 */

import java.util.*;

public class CarMuseum implements Measurable
{
    private ArrayList<String> cars;
    public static int count = 0;

    public CarMuseum(String input)
    {
        cars = new ArrayList<String>();
        String[] arr = input.split(",", 0);
        cars.add(arr[0]);
        count++;
        for(String a : arr)
        {
            for(int i = 1; i < cars.size() + 1; i++)
            {
                if(a == cars.get(i - 1))
                {
                    break;
                }
                else if(i == cars.size())
                {
                    cars.add(a);
                    count++;
                }
            }
        }
    }


    /**
     Returns the count of cars
     @return the count of cars in the museum
     */

    public double getMeasure()
    {
        return (double)count - 1;
    }
}